In the world of fitness, the old mantra was simple: more is better. If you weren't completely exhausted at the end of a workout, you weren't trying hard enough. But the elite sports science community has officially retired that mindset. Peak performance isn't about working yourself too hard; it’s about precision calibration. It’s about knowing exactly how much stress your body can handle on any given day and training accordingly. On the WHOOP platform, this cardiovascular and central nervous system load is measured as 'Strain'. Let's dive into the science behind how tracking your daily strain can help you avoid injury, crush…